Ah, thanks! Sorry, I originally opened the thread on my phone and didn't notice which section I was in.
I moved it to Suspension for future reference.
As far as the tool, Kitty (Angelicmisskitty) found it for me as a favor in Germany. Perhaps she can share where she found it or you can arrange for her to procure one for you. I know when I did the Subframe bushings for my E39 Tour, that special tool from the UK was like $450, so this one is a bargain.
The Trailing arm tool, I picked up from someone here for a great price.
Both tools together made extracting and installing the 6 bushings about a 1 hour job once the subframe was out of the car. I will now work to renew the subframe bushings on the other TIs and Z3s as I found mine ripped on the S52 TI.
Cheers!